I had the same exact feelings/thoughts as I was reading SC's post yesterday. It really struck a nerve with me. It is really hard to imagine that my STBXW was feeling that way, but it is reality.
I think one of the most confusing/depressing aspects of all of this for most LBS, is that the WAS is willing to be alone and deal with any hardships that come along with that, then to remain married to us and trying to make it work.
When the pain of staying is greater than the pain of leaving, they will only see one option.
While certainly true, I CAN assuage my feelings a bit when I realize all the changes I made in myself - and these were no doubt for ME. But if my changes didn't have an impact on my W's decision, then maybe I have less to do with her unhappiness than she believes.